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PatchSiren cyber security CVE debrief

CVE-2018-0173 Cisco CVE debrief

CVE-2018-0173 is a Cisco IOS and IOS XE Software improper input validation vulnerability that CISA has listed in its Known Exploited Vulnerabilities catalog. The key defensive takeaway is straightforward: treat this as a high-priority remediation item and apply Cisco-recommended updates as soon as possible.

Vendor
Cisco
Product
IOS and IOS XE Software
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-03
Original CVE updated
2022-03-03
Advisory published
2022-03-03
Advisory updated
2022-03-03

Who should care

Organizations that operate Cisco IOS or IOS XE Software, especially network and security teams responsible for routers, switches, and other managed Cisco infrastructure.

Technical summary

The available source corpus identifies the flaw as an improper input validation vulnerability in Cisco IOS and IOS XE Software. CISA’s KEV entry indicates it is known to be exploited in the wild, but the supplied materials do not provide deeper technical details such as affected versions, attack path, or impact scope.

Defensive priority

High. Known exploitation elevates urgency even when technical detail is limited in the source corpus.

Recommended defensive actions

  • Apply Cisco updates per vendor instructions for any affected IOS and IOS XE systems.
  • Inventory Cisco IOS and IOS XE assets so remediation can be tracked and verified.
  • Prioritize remediation on devices that are critical to network availability and security operations.
  • Confirm completion against Cisco guidance and CISA KEV tracking.
  • Monitor Cisco and CISA updates for any changes to remediation guidance or affected-product scope.

Evidence notes

The evidence base here is the CISA Known Exploited Vulnerabilities listing and its associated source metadata, which states the vulnerability is in Cisco IOS and IOS XE Software, is an improper input validation issue, and requires applying updates per vendor instructions. The supplied corpus also references the official NVD and CVE record URLs, but it does not include additional advisory text or version-specific details.

Official resources

CISA added this vulnerability to the Known Exploited Vulnerabilities catalog on 2022-03-03, with a due date of 2022-03-17 for applying updates per vendor instructions. The debrief uses the supplied CVE publication context and KEV metadata;